<?php
function unicode_convert($str){
  	        if(!$str) return false;
  	        $unicode = array(
        		'a'=>array('á','à','ả','ã','ạ','ă','ắ','ặ','ằ','ẳ','ẵ','â','ấ','ầ','ẩ','ẫ','ậ','Á','À','Ả','Ã','Ạ','Ă','Ắ','Ặ','Ằ','Ẳ','Ẵ','Â','Ấ','Ầ','Ẩ','Ẫ','Ậ'),
  	            'd'=>array('đ','Đ'),
  	            'e'=>array('é','è','ẻ','ẽ','ẹ','ê','ế','ề','ể','ễ','ệ','É','È','Ẻ','Ẽ','Ẹ','Ê','Ế','Ề','Ể','Ễ','Ệ'),
  	            'i'=>array('í','ì','ỉ','ĩ','ị','Í','Ì','Ỉ','Ĩ','Ị'),
  	            'o'=>array('ó','ò','ỏ','õ','ọ','ô','ố','ồ','ổ','ỗ','ộ','ơ','ớ','ờ','ở','ỡ','ợ','Ó','Ò','Ỏ','Õ','Ọ','Ô','Ố','Ồ','Ổ','Ỗ','Ộ','Ơ','Ớ','Ờ','Ở','Ỡ','Ợ'),
  	            'u'=>array('ú','ù','ủ','ũ','ụ','ư','ứ','ừ','ử','ữ','ự','Ú','Ù','Ủ','Ũ','Ụ','Ư','Ứ','Ừ','Ử','Ữ','Ự'),
  	            'y'=>array('ý','ỳ','ỷ','ỹ','ỵ','Ý','Ỳ','Ỷ','Ỹ','Ỵ'),
  	            '-'=>array(' ','&quot;','.'),
				''=>array('"',"'",",",":",";","$",'%','/','+'),
  	        );
  	        foreach($unicode as $nonUnicode=>$uni){
  	        	foreach($uni as $value)
            	$str = str_replace($value,$nonUnicode,$str);
  	        }
    	return $str;
	}
?>